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Abstract：
We present the design, fabrication, and test of a multipurpose integrated circuit (Application Specific Integrated Circuit) in AMS 0.35 µm Complementary Metal Oxide Semiconductor technology. This circuit is embedded in a scleral contact lens, combined with photodiodes enabling the gaze direction detection when illuminated and wirelessly powered by an eyewear. The gaze direction is determined by means of a centroid computation from the measured photocurrents. The ASIC is used simultaneously to detect specific eye blinking sequences to validate target designations, for instance. Experimental measurements and validation are performed on a scleral contact lens prototype integrating four infrared photodiodes, mounted on a mock-up eyeball, and combined with an artificial eyelid. The eye-tracker has an accuracy of 0.2°, i.e., 2.5 times better than current mobile video-based eye-trackers, and is robust with respect to process variations, operating time, and supply voltage. Variations of the computed gaze direction transmitted to the eyewear, when the eyelid moves, are detected and can be interpreted as commands based on blink duration or using blinks alternation on both eyes.
摘要：
我们提出的设计，fabrication,并在AMS0.35µm互补金属氧化物半导体技术中测试多用途集成电路（专用集成电路）。该电路嵌入巩膜隐形眼镜中，与光电二极管相结合，当照明和由眼镜无线供电时，能够进行注视方向检测。凝视方向借助于根据所测量的光电流的质心计算来确定。ASIC同时用于检测特定的眨眼序列，以验证目标名称，例如。在整合了四个红外光电二极管的巩膜隐形眼镜原型上进行了实验测量和验证，安装在一个模型的眼球上，并结合了人工眼睑。眼睛跟踪器的精度为0.2°，即，比当前基于移动视频的眼睛跟踪器好2.5倍，并且在过程变化方面是稳健的，操作时间,和电源电压。传输到眼镜的计算的注视方向的变化，当眼睑移动时，被检测到，并且可以被解释为基于眨眼持续时间或使用双眼眨眼交替的命令。
